Extended Data Fig. 2: Testing possible contributions of artefacts to the observed peak offset.

a, b, The disk model with warp (a) and without warp (b). The intensity scale is arbitrary. The nth contour represents 50 × 2ⁿ% (n = −5, −4, −3, −2, −1, 0). c, d, Results of pseudo-observations of the disk models with warp (c) and without warp (d) using the same u,v-pattern as in the actual observation; the images are obtained by tapering the u,v data to give a round-shaped beam. The nth contour represents 20 × 2ⁿσ (n = 0, 1, …), where 1σ means 0.12 mJy per beam. e, f, Pseudo-observations of the disk models with warp (e) and without warp (f) by using the same u,v-pattern in the actual observation. The nth contour represents 20 × 2ⁿσ (n = 0, 1, …), where 1σ means 0.09 mJy per beam. In c–f, the total flux within the 20σ contour is scaled to the flux within the same region of the observed 0.9-mm dust continuum emission. See Methods section ‘Effect of the limited distribution of the u,v data’ for further details.